handle slides messages

...ml5/imports/api/2.0/presentations/server/eventHandlers.js

....0/presentations/server/handlers/presentationInfoReply.js

...api/2.0/presentations/server/modifiers/addPresentation.js

...-html5/imports/api/2.0/presentations/server/publishers.js

...tton-html5/imports/api/2.0/slides/server/eventHandlers.js

...ml5/imports/api/2.0/slides/server/handlers/slideChange.js

bigbluebutton-html5/imports/api/2.0/slides/server/methods.js

...tml5/imports/api/2.0/slides/server/methods/switchSlide.js

...html5/imports/api/2.0/slides/server/modifiers/addSlide.js

...ebutton-html5/imports/api/2.0/slides/server/publishers.js

bigbluebutton-html5/imports/startup/client/base.jsx

bigbluebutton-html5/imports/startup/server/redis2x.js

bigbluebutton-html5/imports/ui/components/media/service.js

...ebutton-html5/imports/ui/components/nav-bar/container.jsx

...on-html5/imports/ui/components/presentation/component.jsx

...i/components/presentation/presentation-toolbar/service.js

...utton-html5/imports/ui/components/presentation/service.js

bigbluebutton-html5/server/main.js